31．Nobody believed the robbery happened last night               the police appeared．

A．after                 B．since                 C．until                   D．while

30．--Would you please help me with my spoken English?

--                  ．Practise makes perfect．

A．That's all right       B．No problem                 C．Quite well           D．No, thanks

29．Taizhou                 great success in her city construction over the years．

A．achieved             B．achieves              C．will achieve         D．has achieved

28．To lose themselves in the netbar（网吧）              on teenagers' future life．

A．have a bad effect                        B．has a bad effect

C．have a good effect                          D．has a good effect

27．--Do you mind using your hard disk?

--                  ．

A．You are welcome                           B．Not at all

C．Yes, you are right                                D．Yes, that's simple

26．Peter was so careless that he                 the books on the shelf．

A．knocked over         B．knocked at           C．knocked on         D．knocked into

25．Students should pay attention to                  the teacher in class．

A．hear                B．listen to             C．listening to           D．hearing of

24．--Can I have some information about these countries?

--                  ．

A．Yes, you can't have it now                 B．Sorry, I don't have it right now

C．Yes, I'm busy now                     D．Sorry, here you are

23．Simon asked his workmates to wear black．But                 of them followed him．

A．no one                 B．every one            C．all                   D．none

22．--What colour of the following represents "purity"?

--                  ．

A．Orange               B．White                 C．Green                D．Red